/Engine/Plugins/EnhancedInput/Source/EnhancedInput/Public/UserSettings/EnhancedInputUserSettings.h
Since a single mapping can have multiple bindings to it and this system should be Blueprint friendly, this needs to be a struct (blueprint don't support nested containers).
[USTRUCT](Programming/UnrealArchitecture/Reference/Structs)([BlueprintType](Programming/UnrealArchitecture/Reference/Structs/Specifiers/BlueprintType)) struct FKeyMappingRow
TSet<FPlayerKe...
Mappings